Year	Number of
1990	2672.11
1991	2791.66
1992	2922.62
1993	3056.34
1994	3205.82
1995	3373.51
1996	3395.78
1997	3422.57
1998	3452.82
1999	3481.21
2000	3507.24
2001	3602.81
2002	3705.34
2003	3835.59
2004	3969.24
2005	4105
2006	4249.93
2007	4394.5
2008	4539.67
2009	4696.76
2010	4872.07
2011	4926.89
2012	4998.48
2013	5075.67
2014	5156.01
2015	5236.08
2016	5308.16